Dental Materials MCQs

Page No. 2

In a high copper amalgam the phase, which is eliminated is_______________?


aGamma 1


bGamma 2


cGamma 1 and 2


dNo phase is eliminated


View Answer Gamma 2

Moisture contamination of amalgam can lead to_____________?


aMarginal breakdown


bShrinkage


cDelayed expansion


dincreased stresses


View Answer Delayed expansion

Discolouration of silver alloy is due to_____________?


aTarnish


bTarnish and corrosion


cWet corrosion


dDry corrosion


View Answer Tarnish and corrosion

Advantage of zinc containing amalgam is_______________?


aBetter handling property


bDimensional Stability


cResistance to creep


dToxicity to pulp and dentin



What is the working time of amalgam?


aOne to two minutes


bThree to four minutes


cFive to six minutes


dSeven to eight minutes


View Answer Three to four minutes

The percentage of copper in high copper alloy is______________?


a10-12%


b0-6%


c13-30%


d20-30%


View Answer 13-30%

How soon after a moisture contamination does a zinc containing amalgam alloy start expanding________________?


a24 hours


b1-2 days


c3-5 days


d7 days


View Answer 3-5 days

What is the most frequently used restorative material ?


aSilicate


bAmalgam


cComposite


dGold


View Answer Amalgam

Which of the following silver amalgam alloy have the maximum strength________________?


aLathe cut


bSpherical


cAdmixed


dSingle composition


View Answer Single composition

Copper content in low copper amalgam is________________?


a6%


b12%


c29%


d19%


View Answer 6%

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